Patents by Inventor Ryosuke Satoh

Ryosuke Satoh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for forming dye images
    Patent number: 4286053
    Abstract: Process for forming yellow dye images in silver halide photographic material using 2-equivalent .alpha.-pivaloyl acetanilide couplers having at the 5-position a ballasting sulfonyl amido group.
    Type: Grant
    Filed: November 21, 1979
    Date of Patent: August 25, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Wataru Ishikawa, Ryosuke Satoh, Kiyoshi Yamashita, Tugumoto Usui, Katsunori Kato
  • Light-sensitive silver halide photographic materials
    Patent number: 4234678
    Abstract: A photographic material having a light-sensitive silver halide emulsion layer coated on a support and containing a compound, useful as a development inhibitor of the formula: ##STR1## wherein X, Y and Z are as herein defined, is described.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: November 18, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shinji Yoshimoto, Mitsuto Fujiwhara, Shoji Kikuchi, Ryosuke Satoh, Takaya Endo, Satoshi Nakagawa
  • DIR coupler that forms colorless reaction product
    Patent number: 4063950
    Abstract: A light-sensitive silver halide photographic material comprising a new development inhibitor releasing type compound and a process for developing thereof.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: December 20, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Takaya Endo, Shoji Kikuchi, Ryosuke Satoh
  • Light-sensitive silver halide photographic material
    Patent number: 4049455
    Abstract: A light-sensitive silver halide photographic material containing a new development inhibitor releasing compound. The said compound has no hydrogen atom at the carbon atom which is adjacent to the carbonyl group and capable of coupling to an oxidation product of a color developing agent on the development.
    Type: Grant
    Filed: July 26, 1976
    Date of Patent: September 20, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shoji Kikuchi, Ryosuke Satoh, Takaya Endo, Katsunori Kato
  • Light-sensitive silver halide color photographic material and a process for developing thereof
    Patent number: 4010035
    Abstract: A light-sensitive silver halide color photographic material comprising a new development inhibitor releasing type compound and a hardening agent and a process for developing thereof.
    Type: Grant
    Filed: May 15, 1975
    Date of Patent: March 1, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Takaya Endo, Ryosuke Satoh
  • Development inhibitor-releasing type compound for photographic use
    Patent number: 3958993
    Abstract: A silver photosensitive material comprising a development inhibitor-releasing compound of the formula ##EQU1## wherein Z is an atomic group necessary to form a 5 to 7 membered saturated or unsaturated carbon ring with the carbon atoms to which it is attached, said ring being unsubstituted or substituted by at least one of halogen and a member of the class consisting of alkyl, aryl, alkoxy, acyloxy, aryloxy, SY and a group forming a condensed carbon ring with said saturated or unsaturated carbon ring; Y is arylmercapto, heterocyclic, thioglycollic acid, cystein or glutathione. A method for the development of silver halide photosensitive material by the use of the foregoing compound is also disclosed.
    Type: Grant
    Filed: November 23, 1973
    Date of Patent: May 25, 1976
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Takaya Endo, Ryosuke Satoh, Toyoaki Masukawa, Satoshi Nakagawa
  • Process for developing light-sensitive silver halide photographic materials
    Patent number: 3938996
    Abstract: This invention relates to a development inhibitor-releasing compound of the following general formula: ##SPC1##Wherein Z is an atomic grouping necessary to form a carbocyclic ring; Y is a group which, when the sulfur atom of the thioether linkage is released, forms together with said sulfur atom a compound having a development-inhibiting action; and X is a hydroxyl group or a substituted or non-substituted amino group.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: February 17, 1976
    Assignee: Konishiroku Photo Industry Co. Ltd.
    Inventors: Mitsuto Fujiwhara, Ryosuke Satoh, Toyoaki Masukawa, Takahiro Uozumi